For one its really bad to sleep on a road, even if there is only foot traffic its just asking to get robbed or ambushed. Or makes you come off like a highway man laying a trap. Either way nothing good can come from it, also animals in real life would use the less used paths at least cross them so a hostile animal could spot you really easy sleeping on or next to a road that is clear in two directions for quite some distance. Over all it just seems bad idea.